Heli-Professional REVOLUTION 500E User Manual page 16

Trim Functions
The trim functions allow you to adjust the flight characteristics and to avoid an unintended drift of the helicopter via
the longitudinal and lateral axis. Do not trim the rudder/tail rotor pitch because this is done automatically by the
gyro system. However, should the tail rotor drift away unintentionally, switch off the helicopter, disconnect all
plugs and then, reconnect all plugs so that the ESC and the FBL-3X gyro system can initialize again.
Nevertheless, the helicopter will never remain absolutely stable in its hovering position even with a perfect trimming.
A steady correction of all control functions is always necessary to keep the helicopter in the intended flight position.
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Mode 2: Hovering/Normal Flight Mode and 3D/Stunt Flight Mode: Trimming the
pitch/throttle is never necessary. Leave the slide control in mid-position.
Mode 2: Use the elevator trim slide control if the helicopter drifts forwards or back-
wards when hovering with no elevator stick input.
Mode 2: Use the aileron/roll trim slide control if the helicopter drifts to the left or
right when hovering with no aileron/roll stick input.
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